Squirting mussel (IMAGE) University of Cambridge Caption This aerial view shows the endangered freshwater mussel, Unio crassus, before (left) and during (right) a water jet squirt Credit University of Cambridge Usage Restrictions With credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.